Quantity   Component name
4 × 1N4004 Discrete Semiconductors / Diodes and Rectifiers
4 × IRLZ44N Discrete Semiconductors / Power Transistors and MOSFETs
4 × 1Kohm resistor
4 × 2.2Kohm resistor
1 × junky laser Try to find focusable laser module. Shouldnt be much more than $3
1 × arduino uno
1 × potentiometer
1 × Stepper motor (I'm using a 5pin, with 1 pin as common)
1 × Make a gear train with belt - harvest from dead VCR
1 × lazy susan bracket
1 × perfboard
1 × USB webcam - I use PS2 EYETOY
1 × power transformer for motor For the love of Arduino, DONT plug the stepper pins in the Arduino!
1 × flimsy wood paneling for walls
1 × wood base - use heafty wood You WILL be screwing stuff in it. Try for 5-ply or better
1 × painters or duct tape to seal cracks on said box